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mafiozo [28]
3 years ago
15

What property of matter determines the electrical conductivity of a substance?

Physics
1 answer:
vlada-n [284]3 years ago
4 0

"Valence" electrons or the free electrons

<u>Explanation:</u>

Electrical conductivity can be defined as the property of the substance to conduct electricity, heat etc through it. This conductivity is caused due to the migration of particles which are electrically charged within the atomic lattice of the substance.

The outermost electrons or the electrons in valence shell are the main cause behind the conductivity property exhibited by any substance. Higher the number of electrons in outer shell, higher the conductivity.

Since these electrons are in the outermost shell, they can move easily. Under an impact of applied heat, charge these electrons migrate through the atomic lattice and thus conducts electricity, heat as the case may be.

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What three factors affect the acceleration of an object?
nignag [31]

Explanation:

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased

7 0
3 years ago
which observation about the Mid-Atlantic Ridge region provides the best evidence of the seafloor has been spreading over for mil
Kitty [74]

Magnetic stripes on the sea floor

Explanation:

The observation of magnetic stripes patterns at the region of the Mid-Atlantic Ridge galvanized the evidence that sea floor spreading has been on for several millions of years.

  • Geomagnetic field of the earth is similar to that of bar magnet having the north and south pole.
  • It originates from the movement of iron-nickel within the outer core.
  • This geomagnetic field causes the magnetization of magnetic minerals in rock.
  • When freshly formed magma is brought to the surface at the mid oceanic ridge area, the prevailing magnetic field causes the magnetic minerals in the magma to cool in such a way that they align their domains to that of the field.
  • The magnetic field of the earth can reverse and take different geometry. Sometimes, its intensity is very strong and at other times it is weak.
  • The magnetic minerals in melts bear these records.
  • As new materials are brought up, they get magnetized.

Learn more:

Sea floor spreading brainly.com/question/9912731

#learnwithBrainly

8 0
3 years ago
Which statement is true?
lora16 [44]
Correct answer is A.

In a parallel circuit, the voltage is same across all the branches however the current in each branch is different and depends on the resistance of that branch. The higher the resistance, the lower the current.

In a series circuit, the voltage across each resistive element is different and depends on the resistance of that element. Higher the resistance, larger will be the voltage drop. However, the current throughout the series circuit is the same as there is only path in a series circuit.

Points to Remember:
1) In series circuit current remains the same and voltage varies
2) In parallel circuit voltage remains the same and current varies
7 0
3 years ago
An AC source operating at a frequency of 250 Hz has a maximum output voltage of 6.00 V. What is the smallest inductor that can b
Julli [10]

Answer:

1.274 H

Explanation:

using

V = XLI...................Equation 1

Where V = voltage, XL = Inductive reactance, I = current.

Make XL the subject of the equation

XL = V/I.............. Equation 2

Given: V = 6.00 V, I = 3.00 mA = 0.003 A

Substitute into equation 2

XL = 6/0.003

XL = 2000 Ω

But,

XL = 2πFL............... Equation 3

Where F = Frequency, L = inductance.

Make L the subject of the equation

L = XL/(2πF).............. Equation 4

Given: F = 250 Hz, XL = 2000 Ω

Constant: π = 3.14

L = 2000/(2×3.14×250)

L = 2000/1570

L = 1.274 H.

3 0
3 years ago
X-rays with an energy of 400 keV undergo Compton scattering with a target. If the scattered X-rays are detected at \theta = 30^{
marissa [1.9K]

Answer:

37.91594 keV

Explanation:

E_i = Incident energy = 400 keV

θ = 30°

h = Planck's constant = 4.135×10⁻¹⁵ eV s = 6.626×10⁻³⁴ J s

Incident photon wavelength

\lambda_i=\frac{hc}{E_i}\\\Rightarrow \lambda_i=\frac{4.135\times 10^{-15}\times 3\times 10^8}{400\times 10^3}\\\Rightarrow \lambda_i=3.101\times 10^{-12}\ m

Difference in wavelength

\Delta \lambda=\frac{h}{m_ec}(1-cos\theta)\\\Rightarrow \Delta \lambda=\frac{6.626\times 10^{-34}}{9.11\times 10^{-31}\times 3\times 10^8}(1-cos30)\\\Rightarrow \Delta \lambda=3.248\times 10^{-13}\ m

\lambda_f=\lambda_i+\Delta \lambda\\\Rightarrow \lambda_f=3.101\times 10^{-12}+3.248\times 10^{-13}\\\Rightarrow \lambda_f=3.426\times 10^{-12}

Final photon wavelength

\lambda_f=\frac{hc}{\lambda_f}\\\Rightarrow E_f=\frac{4.135\times 10^{-15}\times 3\times 10^8}{3.426\times 10^{-12}}\\\Rightarrow E_f=362084.06\ eV = 362.08406\ keV

Energy of the recoiling electron

\Delta E=E_i-E_f\\\Rightarrow \Delta E=400-362.08406=37.91594\ keV

Energy of the recoiling electron is 37.91594 keV

8 0
4 years ago
Read 2 more answers
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